Stacking tray



FIG. 1 is a perspective view of the stacking tray showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and

FIG. 4 is a side elevational view thereof, the opposite side elevational view being a mirror image thereof. 

The ornamental design for a stacking tray, as shown and described. 